Global Warmingwww.spiritscienceandmetaphysics.com

Topics

I. Glacier II. Glacial Ages III. Glacial and Interglacial stagesIV. Plate Tectonics V. Variations in Earth’s orbits

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Global Warming

• Term for the observed century-scale rise in average temperature of Earth’s Climate System

• Multiple scientific evidence shows that the climate system is warming

• increase of near-surface atmospheric temperature is the measure of global warming

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What is a glacier?

What are glacial ages?

• Fallen Snow• Snow in one location• Occupies 10% of earth’s total land area

• Also known as “Ice Age”• Ice sheets and Glaciers exist• period which long-term cooling takes place

https://en.wikipedia.org/wiki/Margerie_Glacier

What causes the alternation of glacial and interglacial stages?

Atmospheric composition• Decreases in atmospheric CO2, started the

long-term cooling trend that led to glaciation.

Ocean Currents• Carries heat to high latitude areas

Plate Tectonics

• describes the large-scale motion of Earth's lithosphere

• Accepted geoscientific community after seafloor spreading was validated

• builds the concept of continental drift

https://en.wikipedia.org/wiki/Plate_tectonics#/media/File:Plates_tect2_en.svg

Variations in Earth’s orbit • eccentricity - Determines the amount by which its orbit around another body

deviates from a perfect circle. Earth’s eccentricity is 0.0167

• obliquity - Angle between the planes of earth's equator and orbit having a

value of about 23°

• precession - Slow changes in an astronomical body's rotational or orbital

parameters

Milankovitch cycle

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What happens to life during ice ages?

Plants• Froze because of the cold temperature

Animals• Died because of the cold temperature, and

loss of food source which is PlantsHumans

• Died because of freezing temperature, and loss of food source which is plants and animals

References• https://nsidc.org/cryosphere/glaciers/questions/what.html• http://www.merriam-webster.com/dictionary/obliquity• https://en.wikipedia.org/wiki/Precession#Astronomy• https://en.wikipedia.org/wiki/Plate_tectonics• https://en.wikipedia.org/wiki/Global_warming • https://en.wikipedia.org/wiki/Glacier • https://en.wikipedia.org/wiki/Glacial_ages • https://en.wikipedia.org/wiki/Orbital_eccentricity• https://en.wikipedia.org/wiki/Quaternary_glaciation#Causes

• https://www.youtube.com/watch?v=McRYTC56DC4 (Video)

• Images• http://www.windows2universe.org/earth/climate/cli_sun.html • https://en.wikipedia.org/wiki/Margerie_Glacier#/media/File:Another_close_view_of_

Marjerie_Glacier.jpg

• www.windows2universe.org• https://en.wikipedia.org/wiki/Plate_tectonics#/media/File:Plates_tect2_en.svg